/*
 * MIT License
 *
 * Copyright (c) 2025-2048 冰羽
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package cn.star.framework.extend.core;

import cn.hutool.core.util.StrUtil;
import cn.hutool.crypto.digest.DigestUtil;
import cn.star.framework.extend.config.Cfg;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * DatabaseFactory<br>
 *
 * @author zhaoweiping
 *     <p style='color: red'>Created on 2025-01-24 17:57:55
 * @since 3.0.0
 */
public final class DatabaseFactory {
  private static final Lock lock = new ReentrantLock();
  private static final Map<String, Database> cache = new ConcurrentHashMap<>();

  public static Database get(Cfg cfg) {
    // 请勿将lock放置在try中
    lock.lock();
    try {
      String key =
          DigestUtil.md5Hex(
              StrUtil.format("{}{}{}", cfg.getUrl(), cfg.getUsername(), cfg.getPassword()));
      Database database = cache.get(key);
      if (database == null) {
        database = cache.get(key);
        if (database == null) {
          database = new Database(cfg);
          cache.put(key, database);
        }
      }
      return database;
    } finally {
      lock.unlock();
    }
  }
}
